# SDR CALA2024062500098

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2024
- Submitted: June 26, 2024
- Operation: Air carrier
- Aircraft: [N17122](https://openairdocs.org/aircraft/N17122), registered now
- Make and model: Boeing 757224
- Aircraft serial: 27564
- Aircraft time: 96,411 hours, 23,218 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning Message
- Condition: Illuminated
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2024062500098

## Discrepancy

CABIN ALT MSG RECEIVED AT FL370. STARTED DESCENT BUT PUT MODE S ELECT TO AUTO 2. GOT CABIN BACK. *DM* MX NOTE. NO FAULTS FOUND ON #1 & #2 CABIN PRESSURE CNTLS REF AMM 21-30-802. PRESSURISED A/C IN MANUAL MODE. OPERATION TEST GOOD  IN MANNUAL MODE REF 21-31-00-715-001. NO AIR GROUND RELAY FAULTS NOTED ON EICAS. A/C OK FOR FLIGHT. MEL APPLIED ON #1 CABIN PRESS.CNTL C/W DDP CABIN ALT AUTO 1 DEFERRED REF MEL 2131A ACCOMPLISHED FIM21-30 FAULT TREE 803,NO FAULTS FOUND,NO MESSAGES NOTED,NO HISTORY.

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